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mpc86xx: Add support to populate addr map based on BATs

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If CONFIG_ADDR_MAP is enabled, update the address map
whenever we write a bat.

Signed-off-by: Becky Bruce <beckyb@kernel.crashing.org>
This commit is contained in:
Becky Bruce 2009-02-03 18:10:52 -06:00 • committed by Wolfgang Denk
parent d35ae5a938
commit c9315e6b4f
4 changed files with 69 additions and 4 deletions
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27
cpu/mpc86xx/cpu_init.c
View file

@ -154,3 +154,30 @@ void setup_bats(void)
return;
}
#ifdef CONFIG_ADDR_MAP
/* Initialize address mapping array */
void init_addr_map(void)
{
int i;
ppc_bat_t bat = DBAT0;
phys_size_t size;
unsigned long upper, lower;
for (i = 0; i < CONFIG_SYS_NUM_ADDR_MAP; i++, bat++) {
if (read_bat(bat, &upper, &lower) != -1) {
if (!BATU_VALID(upper))
size = 0;
else
size = BATU_SIZE(upper);
addrmap_set_entry(BATU_VADDR(upper), BATL_PADDR(lower),
size, i);
}
#ifdef CONFIG_HIGH_BATS
/* High bats are not contiguous with low BAT numbers */
if (bat == DBAT3)
bat = DBAT4 - 1;
#endif
}
}
#endif

16
include/asm-ppc/mmu.h
View file

@ -138,6 +138,10 @@ typedef struct _MMU_context {
extern void _tlbie(unsigned long va); /* invalidate a TLB entry */
extern void _tlbia(void); /* invalidate all TLB entries */
#ifdef CONFIG_ADDR_MAP
extern void init_addr_map(void);
#endif
typedef enum {
IBAT0 = 0, IBAT1, IBAT2, IBAT3,
DBAT0, DBAT1, DBAT2, DBAT3,
@ -203,6 +207,14 @@ extern void print_bats(void);
#define BPP_RX 0x01 /* Read only */
#define BPP_RW 0x02 /* Read/write */
/* Macros to get values from BATs, once data is in the BAT register format */
#define BATU_VALID(x) (x & 0x3)
#define BATU_VADDR(x) (x & 0xfffe0000)
#define BATL_PADDR(x) ((phys_addr_t)((x & 0xfffe0000) \
| ((x & 0x0e00ULL) << 24) \
| ((x & 0x04ULL) << 30)))
#define BATU_SIZE(x) (1UL << (fls((x & BATU_BL_MAX) >> 2) + 17))
/* Used to set up SDR1 register */
#define HASH_TABLE_SIZE_64K 0x00010000
#define HASH_TABLE_SIZE_128K 0x00020000
@ -462,9 +474,7 @@ extern void set_tlb(u8 tlb, u32 epn, u64 rpn,
extern void disable_tlb(u8 esel);
extern void invalidate_tlb(u8 tlb);
extern void init_tlbs(void);
#ifdef CONFIG_ADDR_MAP
extern void init_addr_map(void);
#endif
extern unsigned int setup_ddr_tlbs(unsigned int memsize_in_meg);
#define SET_TLB_ENTRY(_tlb, _epn, _rpn, _perms, _wimge, _ts, _esel, _sz, _iprot) \

28
lib_ppc/bat_rw.c
View file

@ -27,14 +27,23 @@
#include <asm/mmu.h>
#include <asm/io.h>
#ifdef CONFIG_ADDR_MAP
#include <addr_map.h>
#endif
DECLARE_GLOBAL_DATA_PTR;
int write_bat (ppc_bat_t bat, unsigned long upper, unsigned long lower)
{
int batn = -1;
sync();
switch (bat) {
case DBAT0:
mtspr (DBAT0L, lower);
mtspr (DBAT0U, upper);
batn = 0;
break;
case IBAT0:
mtspr (IBAT0L, lower);
@ -43,6 +52,7 @@ int write_bat (ppc_bat_t bat, unsigned long upper, unsigned long lower)
case DBAT1:
mtspr (DBAT1L, lower);
mtspr (DBAT1U, upper);
batn = 1;
break;
case IBAT1:
mtspr (IBAT1L, lower);
@ -51,6 +61,7 @@ int write_bat (ppc_bat_t bat, unsigned long upper, unsigned long lower)
case DBAT2:
mtspr (DBAT2L, lower);
mtspr (DBAT2U, upper);
batn = 2;
break;
case IBAT2:
mtspr (IBAT2L, lower);
@ -59,6 +70,7 @@ int write_bat (ppc_bat_t bat, unsigned long upper, unsigned long lower)
case DBAT3:
mtspr (DBAT3L, lower);
mtspr (DBAT3U, upper);
batn = 3;
break;
case IBAT3:
mtspr (IBAT3L, lower);
@ -68,6 +80,7 @@ int write_bat (ppc_bat_t bat, unsigned long upper, unsigned long lower)
case DBAT4:
mtspr (DBAT4L, lower);
mtspr (DBAT4U, upper);
batn = 4;
break;
case IBAT4:
mtspr (IBAT4L, lower);
@ -76,6 +89,7 @@ int write_bat (ppc_bat_t bat, unsigned long upper, unsigned long lower)
case DBAT5:
mtspr (DBAT5L, lower);
mtspr (DBAT5U, upper);
batn = 5;
break;
case IBAT5:
mtspr (IBAT5L, lower);
@ -84,6 +98,7 @@ int write_bat (ppc_bat_t bat, unsigned long upper, unsigned long lower)
case DBAT6:
mtspr (DBAT6L, lower);
mtspr (DBAT6U, upper);
batn = 6;
break;
case IBAT6:
mtspr (IBAT6L, lower);
@ -92,6 +107,7 @@ int write_bat (ppc_bat_t bat, unsigned long upper, unsigned long lower)
case DBAT7:
mtspr (DBAT7L, lower);
mtspr (DBAT7U, upper);
batn = 7;
break;
case IBAT7:
mtspr (IBAT7L, lower);
@ -102,6 +118,18 @@ int write_bat (ppc_bat_t bat, unsigned long upper, unsigned long lower)
return (-1);
}
#ifdef CONFIG_ADDR_MAP
if ((gd->flags & GD_FLG_RELOC) && (batn >= 0)) {
phys_size_t size;
if (!BATU_VALID(upper))
size = 0;
else
size = BATU_SIZE(upper);
addrmap_set_entry(BATU_VADDR(upper), BATL_PADDR(lower),
size, batn);
}
#endif
sync();
isync();

2
lib_ppc/board.c
View file

@ -685,7 +685,7 @@ void board_init_r (gd_t *id, ulong dest_addr)
*/
trap_init (dest_addr);
#if defined(CONFIG_ADDR_MAP) && defined(CONFIG_E500)
#ifdef CONFIG_ADDR_MAP
init_addr_map();
#endif